[PULL 18/41] hw/core: Replace device_class_set_props with a macro

[Paolo Bonzini]

From: Richard Henderson <richard.henderson@linaro.org>

Use ARRAY_SIZE to implement as device_class_set_props_n.
Remove any DEFINE_PROP_END_OF_LIST terminator from the count.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Link: 
20241216035109.3486070-19-richard.henderson@linaro.org">https://lore.kernel.org/r/20241216035109.3486070-19-richard.henderson@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/hw/qdev-core.h    | 21 +++++++++++++--------
 hw/core/qdev-properties.c | 16 ----------------
 2 files changed, 13 insertions(+), 24 deletions(-)

diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index cd0ddf84ca5..5dc46402585 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -941,20 +941,25 @@ char *qdev_get_own_fw_dev_path_from_handler(BusState 
*bus, DeviceState *dev);
 /**
  * device_class_set_props(): add a set of properties to an device
  * @dc: the parent DeviceClass all devices inherit
- * @props: an array of properties, terminate by DEFINE_PROP_END_OF_LIST()
+ * @props: an array of properties
  *
  * This will add a set of properties to the object. It will fault if
  * you attempt to add an existing property defined by a parent class.
  * To modify an inherited property you need to use????
+ *
+ * Validate that @props has at least one Property plus the terminator.
+ * Validate that @props is an array, not a pointer, via ARRAY_SIZE.
+ * Validate that the array is terminated at compile-time (with -O2),
+ * which requires the array to be const.
  */
-void device_class_set_props(DeviceClass *dc, const Property *props);
-
-/* Validate at least one Property, plus the terminator. */
-#define device_class_set_props(DC, PROPS) \
+#define device_class_set_props(dc, props) \
     do {                                                                \
-        QEMU_BUILD_BUG_ON(sizeof(PROPS) != sizeof(const Property *) &&  \
-                          sizeof(PROPS) < 2 * sizeof(Property));        \
-        (device_class_set_props)(DC, PROPS);                            \
+        QEMU_BUILD_BUG_ON(sizeof(props) < 2 * sizeof(Property));        \
+        size_t props_count_ = ARRAY_SIZE(props) - 1;                    \
+        if ((props)[props_count_].name != NULL) {                       \
+            qemu_build_not_reached();                                   \
+        }                                                               \
+        device_class_set_props_n((dc), (props), props_count_);          \
     } while (0)
 
 /**
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 31e3072b559..a3d49e20202 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -1058,22 +1058,6 @@ static void qdev_class_add_legacy_property(DeviceClass 
*dc, const Property *prop
         NULL, NULL, (Property *)prop);
 }
 
-void (device_class_set_props)(DeviceClass *dc, const Property *props)
-{
-    const Property *prop;
-    size_t n;
-
-    dc->props_ = props;
-    for (prop = props, n = 0; prop && prop->name; prop++, n++) {
-        qdev_class_add_legacy_property(dc, prop);
-        qdev_class_add_property(dc, prop->name, prop);
-    }
-
-    /* We used a hole in DeviceClass because that's still a lot. */
-    assert(n <= UINT16_MAX);
-    dc->props_count_ = n;
-}
-
 void device_class_set_props_n(DeviceClass *dc, const Property *props, size_t n)
 {
     /* We used a hole in DeviceClass because that's still a lot. */
-- 
2.47.1